Presidential Transition:

Plum Book, 1996-2016 - Lists the top 8,000 jobs (official title: U.S. Government Policy and Supporting Positions). It's published every four years, in December after the presidential election, by Congressional committees as a guide for incoming administrations.

The Virtual Chase - "Teaching legal professionals how to do research." This site by a law
librarian covers more than just legal research, including researching companies, finding people, and finding factual
information in many areas.